Engine, pump, compressor, and the like



June 10, 1930.

H. HEINRICH Emma, PUMP, COMPRESSOR, AND THE-LIKE Filed May 15, 1928 ZSheets-Sheat. 1

June 10, 1930. HElNRlCH mma, PUMPL' COMPRESSOR, AND THE LIKE i Filed May 16, 1928 2 Sheets-Sheet. 2

inveman Patented June 10, 1936 UNITED STATES HUGO HEINRICH, OF ZW'ICKLU, GERMANY ENGINE, PUMP, COMPRESSOR, AND THE LIKE Application filed May 16, 1928, Serial No.

My invention has reference to engines with rotary pistons, and the'object of the present invention is to provide means adapted to facilitate the construction and the general operation of. such engines, to eliminate sources of undesired interruption of operation and to further improve the comblnation and cooperation of the constituent parts of such engines. The invention refers in particular to engines of the kind referred 'to in which a stationary-member acting as an engine cylinder is surrounded by a cylindrical hollow member acting as a piston. The arrangement of the parts is such that the inner Wall of the-outer movable piston is engaged by the outer wall of the inner stationary cylinder and is adapted to revolvingly and oscillatingly move along the surface of said cylinder in such a manner that the piston is prevented from revolving-about its own axis, but is caused to eccentrically oscillate about the stationary hollow cylinder. The crescent-shaped working space is subdivided by a suitable abutment which will be more particularly described hereinafter, and the proper mounting of which with relation to the other parts of the engine constitutes one of the chief objects of this invention.

The invention also has for its object to provide means to prevent any axial rotation -of the piston about its axis, such means compelling the piston to perform an eccentric, oscillating movement. I

The invention will now be described by reference to the accompanying drawing, illustrating the principles of the invention by Way of an embodiment. Fig. 1 is a crosssectional view of this embodiment; Fig. 2 is a longitudinal section, and Figures 3 and 4 are similar views of a modification.

In the drawing the inner stationary cylinder is designated 1 while the outer hollow piston surrounding the cylinder is shown at 2 which, while performing an eccentric oscillation forms a crescent-shaped working space with the cylinder 1. The movement of the iston 2 is produced by means of a projecting hub 3 which is journaled upon an 60 eccentric member 5 connected to or formed 278,277, and in Germany August 10, 1927.

integral with the driving shaft 4. The tires 7 cent-shaped working space is subdivided by the abutment 6, so that two compartments are formed. which, when the engine is used for instance as a pump, constitute respectively the suction space and the pressure space. It should however be understood that the' device according to this invention mayalso be employed for other uses, for instance as a steam engine and the like. In the embodiment shown and with the iston 2 moving in the direction of rotation indicatedb the arrow in Fig. 1 the suction opening is esignated 7, while the pressure opening is shown at 8. The suction opening 7 is connected to the suction pipe 9, and the discharge open- 'ing 8 is connected to the pressure pipe 10.

The abutment 6"is pivotally disposed in the stationary cylinder 1 and projects through the wall of the piston 2 and with its projecting portion is inserted in a swivellingstud or pintle 11. f In this manner the abutment 6 can freely move with great ease into all: necessary positions with relation to the other parts. The circular washers or sealing members are indicated at 12 and 13 and are adapted to prevent leakage from the working space.

In order to prevent rotation of the piston about its own axis, the piston 2 is provided with a projecting part 14 which carries a bolt 15 upon which the roller 16 is mounted. This roller during the rotating movement of the shaft 45 and its eccentric part 5 is guided in a suitable guide or in races 17 of the easing 18 and is supported thereby. Between the roller 16 and the bolt 15 a sliding box, ring or the like may be arranged for the purpose of facilitating the rotary movement of the roller 16' on the bolt 15. Harmful friction may also be avoided b mounting a ball hearing or the like on the olt 15 instead of the roller 16, or in conjunction therewith, the roller or the ball bearing revolving upon the guide or ball-race 17 Q The piston guide may be closed b cover 19 adapted to receive the dri pin oi or the leak from the engine, until t e ro ler 16 will be immersed inthis li uidor semi-liquid mass which acts as 0. ln ricant, so that by 106- this means the necessity of special lubricating members for the roller is avoided.

The modification according to Figures 3 and 4 of the drawing corresponds in its general features to the construction shown in Figures 1 and 2. In the modification however the abutment 6, instead of being pivotally suspended from the stationary cylinder, is pivotally mounted in the movable piston, while the swivelling stud instead of be- .ing arranged in the piston is disposed in the stationary cylinder. This arrangement constitutes some kind of a reversal of the principle illustrated in Figures land 2, the results as to the e'fiiciency and mode of operation however being identical. In this modification the supporting and guiding roller 16 has been replaced by a slide 20 which is guided preferably in a straight path along 20 a correspondingly shaped guiding surface or 'race' of the casing.

I The invention is of course susceptible of other modifications and changes in the construction and arrangements of parts for the purpose mentioned, and within the scope and spirit of the invention, as expressed in the appended claims. I

I claim 1. In a device ofthe kind described, in

80 combination, an inner stationary cylindrical member, an outer, substantially hollow cylindrical member surrounding said stationary member and of larger diameter than the same, means to eccentrically oscillate said 355outer mmeber in engagement with said stationary member, an abutment pivotally dis- I osed in said stationary member and pro jecting through said outer member being rockingly mounted, feeding and discharging 4o means on said stationary member respectively 1 on either side of said abutment, and means preventing rotation of the said outer member about its own axis.

2..In a device of the kind described, in

'45 combination, an inner stationary cylindrical member,- an outer substantially cylindrical hollow member of lar er diameter than said stationary member angengagingly surrounding the same, means adapted to eccentrically oscillate said outer member in engagement with said stationary member, an abutment rockingly mounted in said stationary member and projecting through the space between said stationary and outer members and through said outer member, substantially trunnion-like means engaging the projecting end of said abutment, feeding and discharging means respectively disposed on either side of said abutment in said stationary 60 member, a casing surrounding said outer gnember, and means on said casing to prevent rotation of said outer member about its own axis.

3. In a device of the kind described, in

combination an inner stationary cylindrical member and an outer hollow cylindrical member of larger diameter than said stationary member and engaging therewith, means member and an outer hollow cylindrical member of larger diameter than said stationary member, means adapted to cause said outer member to eccentrically and engagingly oscillate along said stationary member, an abutment rockingly disposed in said two members, feeding and discharging means communicating with the space between said two members, a .casing spacedly surrounding said members, a hollow projection in the bottom portion of said casing, a projection on said said outer member entering the hollow projection of the casing and a sliding member on the projection of the exterior member, slidingly engaging the walls of said hollow projection.

5. In a device of the kind described, in combination, an inner stationary cylindrical member, an outer hollow cylindrical member of larger diameter than said stationary member, means adapted to cause said outer member to eccentrically. and engagingly oscillate along said stationary member, a subdividing abutment rockingly disposed in said two members, feeding and discharging means communicating with the space between said two members, a casing 'spacedly surrounding said members, a hollow projection in the bottom part of said casing, a projection on said outer member, entering said hollow projection, a roller pivotally secured on the projection of said outer member and guided therein, and covering and sealing means for said hollow projection, adapted for the reception of lubricant and for the discharge of matter accumulated in said hollow projection. p

In testimony whereof I have aflixed my signature. 1

' HUGO HEINRICH. 

